Reflector for light projectors



June 3, 1930. J, FYRBERG v I 1,761,528

REFLECTOR FOR LIGHT PROJECTORS Filed Aug. 10. 1928 I: v -m... I

Patented June 3,1930

NILS J. A. antenna,

PATENT OFFICE 01? DEXTER, MAINE REFLECTOR FOB. IZIG HT PROJECTORS' Application med August 10, 1922;. Serial No. 298,690.

. vThis invention relates to a reflector for automobileelectric headlights, spot lights, search lights and for similar purposes.

I The principal objects of the invention are 6 to provide a reflector to be used with an incandescent lamp fastened through the axial center of it with means whereby the front surface of the reflector can be cleaned and scrubbed as often as desired without any dan- 10 ger of the removal or deterioration of the metallized surface producing the reflection;

to provide a construction in which the mirror will be of a better and more efficient character than those usually employed for automobile lights, and to provide a construction in which the metal surface for producing the reflection will not be affected by moisture.

Other objects and advantages of the inven-. tion will appear hereinafter.

Reference is to be had to the accompanying drawing which is an axial central sectional View of a head light constructed in acc0rdance with this invention.

I have shown the invention as applied to a lamp having a glass closureor lens 10, casing 11 and a center-adapter 12 arranged axially, adjustable by a screw 13 and .spring 14 carrying the usual electric lamp 15 of the incandescent varietys The reflector, which is the principal feature of this invention, consists of a hollow piece of glass with the inside of concave form and made hollow.v It comprises an inner ffront wall 16 and a back wall 17 of glass formed of a single integral structure having a surrounding hollow bead 18' at the edge and a cylindrical neck 19 at the rear. This mirror is made hollow and the inner surfaces 20 and 21 are silvered or coated with silver, gold orother metal to form reflecting flecting surface is provided than with the usual construction in which the outer or concave surface is silvered. This is due .to the fact that the application of the metal to the 5 inner surface of apiece of glass renders that it will beseen that a much more eflicient reinner surface brightly reflecting and the metal does not have to be polished in any way or smoothed on the back to get a perfect reflecting surface.

necessary and people who realize that fail to clean their reflectors and thus get poor results.

Furthermore, the exhaustion of the air in the interior removes the moisture and there is practically no chance of any chemical action, due to moisture or other acids damaging the metal inside.

The lamp is mounted in the cylindrical opening through the neck of the reflector by the use of a metal sleeve 23 extending through the opening and receiving the lamp adapter 12 and locked in place by a ring 24 of a flat shape with an annular flange fitting the sleeve. To prevent the ring and sleeve coming in contact with the glass reflector, or with the neck thereof, a pairofcork insulators 25 are placed in contact with the glass on one side and with the two metallic members 23 and 2 1 on the other. These cork insulators are concave on one side and flat on the other so as to fit the parts with which they come in contact.

To prevent injury to the reflector from road shocks an insulator 26 is pressed over the outsideofthe cylindrical neck of the reflector and inserted into a seat in the cup 27 of the metal, which acts as a means for holding the reflector in proper relation to the lamp casing 11, to which the cup 27 isriveted.

The way of supporting the reflectorat the center and the lamp in the center of the reflector therefore provides for enough resiliency to absorb the vibrations, the insulator 26 being madeof cork 'or other soft yielding insulating body.

, gaskets 25 and 26, although other non-metallie and flexible material could be used.

They are held in place between a metal retaining ring 32 of annular form and clips 33 by means of screws 34 by which these metallic elements can be caused to grip the two gaskets with the desired amount of pressure.

The lens 10 .is shown as being held between a portion of the gasket 31 and a gasket 35 0f flat form which 1s pressed againstihe I lens by screws 36 which pass through the retaining ring 32 and in the exterior rim or bezel 37, which also engages the gasket 35 and finishes the front of the lamp passing outside the edge flange of the casing 11.

By this construction, the reflector can be cleaned in the ordinary manner and scrubbed as hard as may be desired without injuring the metallic surface of the reflecting medium. The glass can be blown or molded, as desired, and has no joints and the metallic re fleeting surface is not subjected to variations in moisture and is protected from deterioration from that source. I

The lamp is held-to the reflector by resilient gaskets or the like and can be adjusted axially by the screw 13 and is held resiliently by the spring 14 to absorb vibration and in fact all vibrations normally are absorbed by the several gaskets. The casing is closed in a convenient but simple and eifect ive manner.

Although I have illustrated and described only one form of the invention, I am aware of the fact that modifications can be made therein by any erson skilled in the art without departing rom the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in this respect, but what I do claim is 1. As an article of manufacture, an electric lamp for the purpose described comprising a casing, a reflector having a hollow wall, a silvered interior surface, and a space therein,

sealed under a vacuum to prevent the effect ofmoisture on the silvered surface and having a passage through it axially and a neck bounding said passage, a. lamp fixture extending through the neck but spaced thereposition, whereby the lamp is firmly but yieldingly mounted in the mirror, and a cork gasket outside the neck and supported by the ody of the lamp casing to hold the mirror at its center.

2. An electric lamp comprising a reflector having a double wall with an exhausted space between the walls and the inside surfaces of both walls silvered and provided extending through the center thereof, a casing surwith an incandescent lamp rounding the "mirror, said mirror having a bead around its outer edge integral with it, soft resilient gaskets surrounding the bead and supporting it on opposite sides, a lens bearing onjthe outer gasket and means for adjustably pressing the edge of the lens against the gasket.

3. An electric lamp comprising a reflector having a double wall with the inside of the rear surface silvered and with an exhausted space between the walls rovided with an incandescent lamp extending through the center thereof adjustably mounted, a casing sur rounding the mirror, said mirror having a bead around its outer edge integral with it, a pair of cork gaskets surrounding the bead and supporting it on opposite sides, a-retain: 1

ing ring on the backside of the bead holding one of said gaskets a ainst the bead, clips on the front side hol ing the other gasket 1 against the bead, and a lens bearing on the outer gasket. 

